Skiving-machine.



A. MLALEXANDER.

SKIVING MACHINE. APPLICATION 111.111) 11111.16, 1910.

Patented Feb. 13,1912.

coumuu PLANDORAFH CD" WASHINGTON. D. C.

I IN 1 TED STATES PATENT OFFICE.

ALEXANDER M. ALEXANDER, 0F BEVERLY, MJQCHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SKIVING-MACHINE.

Specification of Letters Patent.

Patented Feb. 13, 1912.

To all whom it may concern:

Be it known that I, ALEXANDER M. ALEX- ANDER, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements 1n skiving-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to certain new and useful improvements in leather skiving machines.

The invention is intended primarily as an improvement in the machine shown and described in the application of Alexander M. Alexander, Serial No. 526,736, filed November 8, 1909, although not confined in its application to such machine.

It has been found in operating upon certain kinds of leather, and more particularly the finer grades of leather, and those having a chrome finish, that the fuzz upon the under or unfinished surface of the leather, in addition to the chips and scraps of leather cut off by the skiving knife, collect upon the peripheral surface of the feed roll to such an extent that the roll will not operate efficiently.

The object of the present invention is to provide improved means for efiectually cleaning the peripheral surface of the feed roll at all times, and in whatever position the roll may be.

With this object in view, the various features of the invention comprise certain novel features of construction, combinations and arrangements of parts hereinafter described.

and claimed, the advantages of which will be apparent to those skilled in the art from the following description.

In the accompanying drawings illustrating the preferred form of the invention, Figure 1 represents a side elevation of a feed roll and mounting therefor with the scraper applied thereto, the skiving knife and easing of the machine being broken away and shown in section in their proper relation to the feed roll; Fig. 2 is a top plan view of the feed roll and mounting therefor with the scraper applied thereto; Fig. 3 is a front elevation of the device shown in Fig. 2; and Fig. 1 is a detail illustrating the scraper removed from the feed roll.

necessary that they In the illustrated embodiment of the machinethe work is fed across a table 1 to the cylindrical skiving knife 2 by means of a feed roll 3 operating in conjunction with the presser foot 4. The feed roll is yieldably forced against the work in the usual manner by a coiled spring 5 arranged in a slot 6 in the collar 7 which is secured to the rod 8. The end of the spring 5 bears against a lug 9 which projects into the slot 6 from one face of a lever 10 and is normally forced against the upper end 11 of the slot 6 to maintain the feed roll in its operative posit-ion. The feed roll 3 is journaled in a block 12 which is pivoted transversely of the rod 8 upon the free end of the lever 10. The pivotal mounting of the block 12 is arranged to allow the feed roll 3 to be oscillated about an axis at right angles to the axis of the rod 8. The feed roll is retained in normal position by a plate 13 secured to the block 12 and projecting into position to engage the side 14 of the lever 10. The block 12 is yieldably held in this position by a coiled spring 12* shown clearly in Fig. 1. This construction is substantially the same as that shown and described in the application for Letters Patent hereinbefore referred to, and is only briefly described herein inconsequence thereof.

It will be seen that the feed roll has a capacity for movement in two directions to enable it to operate successfully under various conditions, and in order that the means which are provided for cleaning the roll shall be effectual at all times, it is shall move synchronously with the roll. With this end in view a roll scraper 15 is fastened at one end to the outer face of the block 12 beneath the feed roll 3. The roll scraper is curved to correspond with the curvature of the peripheral surface of the feed roll, in order that it may contact with and clean all points upon the surface. In order that the scraper may act efiiciently as the feed roll is worn away, it is adjustably fastened to the block 12 by a screw 16 and elongated slot 17. It will be noted that by mounting the scraper in this manner upon the block 12 it .will move with the roll upon a bodily movement of the roll and support relatively to the skiving knife, and it will also tip laterally with the roll and block 12. In order that the chips which collect upon the surface of the feed rool.

the feed roll may be more efiiciently removed, the scraper 15 is arranged diagonally of the axis of the roll so that the scraper has a shearing action upon the material which it is desired to clean from The free end of the scraper projects outwardly beyond the edge of the skiving knife, and as the chips are directed outwardly by the scraper when shearing them from the feed roll they will drop beyond the skiving knife without the necessity of using a feed chute.

Having explained the nature and object of the invention, and specifically described one form of machine in which it may be embodied, what I claim is 1. A skiving machine comprising'a knife, a feed roll supported adjacent thereto and arranged to have, a bodily movement to and from the edge of the skiving knife and to be tipped relatively to the knife, and a scraper fixedly secured adjacent to the surface of the feed roll and movable with the from the edge of the knife and to be tipped relatively to the knife, and a scraper fixedly secured adjacent to the surface of the feed roll and having. provision for adjustment relatively to the feed roll, substantially as described.

3. A skiving machine comprising a knife, a feed roll, a scraper arranged diagonally of the axis of the feed roll and having one end projecting outwardly beyond the edge of the skiving knife in order to direct the chips which are sheared from the feed roll away from the skiving knife, substantially as described.

A. A skiving machine comprising a skiv ing knife, a feed roll, means for yieldingly supporting the feed roll adjacentto the skiving knife comprising a rod, a lever pivot-- ally mounted upon the rod, a block mounted upon the free end of the lever and adapted to oscillate transversely of the rod, the feed roll being journaled in the block, and a scraper mounted upon the block adjacent to the peripheral surface of the feed roll, sub stantially as described.

ALEXANDER M. ALEXANDER.

\Vitnesses CHESTER E. ROGERS, LAURA M. Goonmoon.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

